1222218611 has 2 divisors, whose sum is σ = 1222218612. Its totient is φ = 1222218610.

The previous prime is 1222218581. The next prime is 1222218619. The reversal of 1222218611 is 1168122221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1222218611 - 2²² = 1218024307 is a prime.

It is not a weakly prime, because it can be changed into another prime (1222218619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611109305 + 611109306.

It is an arithmetic number, because the mean of its divisors is an integer number (611109306).

Almost surely, 2^1222218611 is an apocalyptic number.

1222218611 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222218611 is an equidigital number, since it uses as much as digits as its factorization.

1222218611 is an evil number, because the sum of its binary digits is even.

The product of its digits is 768, while the sum is 26.

The square root of 1222218611 is about 34960.2432914875. The cubic root of 1222218611 is about 1069.1770569867.

The spelling of 1222218611 in words is "one billion, two hundred twenty-two million, two hundred eighteen thousand, six hundred eleven".